135890401 has 6 divisors (see below), whose sum is σ = 144354470. Its totient is φ = 127896576.

The previous prime is 135890399. The next prime is 135890423. The reversal of 135890401 is 104098531.

It can be written as a sum of positive squares in 3 ways, for example, as 17842176 + 118048225 = 4224^2 + 10865^2 .

It is not a de Polignac number, because 135890401 - 2¹ = 135890399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135890471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234816 + ... + 235393.

Almost surely, 2^135890401 is an apocalyptic number.

It is an amenable number.

135890401 is a deficient number, since it is larger than the sum of its proper divisors (8464069).

135890401 is an equidigital number, since it uses as much as digits as its factorization.

135890401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470243 (or 470226 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 135890401 is about 11657.2038242453. The cubic root of 135890401 is about 514.1181389031.

The spelling of 135890401 in words is "one hundred thirty-five million, eight hundred ninety thousand, four hundred one".